Master's MateSafety Initiative Network

The Master's Mate Safety Initiative Network (MMSIn) — like AAA for the ocean, but free & community-driven. Cruisers keeping each other safe: anchor-drag & distress alerts, a verified captains directory, and a watch network that has your back.

Recreational

SEMPER FI

MMSI 366611070 · Call sign WCJ2353

Not yet on Master's Mate

Type

Recreational

Flag

USA

Length

10 m

Beam

3.7 m

Draft

2.1 m

Call sign

WCJ2353

Official No.

661310

AIS reports

On the American registry, SEMPER FI is a 10-metre weekend cruiser. Her hull carries a beam of 3.7 m and a draft measuring 2.1 metres. She's listed under MMSI 366611070, call sign WCJ2353. Claim SEMPER FI free on the Master's Mate Safety Initiative Network and let nearby cruisers have her back.

Free forever · No credit card · for recreational captains

Keep SEMPER FI looked after — even when you’re not aboard.

Anchor alarms that wake you, a live camera at the dock, and weather you can trust before every run.

Look after her — claim free →

Takes 60 seconds · Your data stays yours · Built by cruisers, for cruisers

Wherever SEMPER FI roams, you're never out there alone.

Thousands of cruisers on the Master's Mate Network — ready to help the moment something goes wrong.

Free with your claim · for recreational captains

The most powerful cruising platform ever built — yours, free.

Joining the Safety Initiative Network doesn't just put SEMPER FI on the map. It hands you the full bridge:

Anchor Watch

GPS-precise drag alarms that actually wake you — and your whole crew. Sleep through the night.

Onboard Cameras

Watch your boat from anywhere — live feeds and 24h recording, straight from your gateway.

Weather & Routing

GRIB wind, swell & current on the chart. Plan passages with ETA-calibrated forecasts per leg.

Worldwide Charts

Navionics-grade vector charts, satellite & raster overlays, online or off. Your whole cruising ground.

Systems Monitoring

Batteries, bilge, tanks, Victron & NMEA 2000 telemetry — your whole boat on one dashboard.

Live AIS & Traffic

See every vessel around you in real time. Closest-approach warnings before they matter.

Distress Mesh

Mayday & Pan-Pan that ripple out to nearby cruisers — a watch network that has your back.

Hail Any Captain

A verified captains directory + direct hailing. Reach the boat next to you, or across the bay.

Claim SEMPER FI and switch it all on

Free to join · nothing to install to start · cancel anytime

Claim free → unlock everything

About SEMPER FI

What kind of vessel is SEMPER FI?

SEMPER FI is a Recreational flagged to United States of America.

What is SEMPER FI's MMSI?

SEMPER FI's MMSI is 366611070. Call sign WCJ2353.

How big is SEMPER FI?

SEMPER FI is about 10 m long, 3.7 m on the beam, drawing 2.1 m.

Is SEMPER FI on the Master's Mate Safety Initiative Network?

Not yet. If SEMPER FI is your boat, you can claim it free and join the Master's Mate Safety Initiative Network (MMSIn).